The Labour Party was officially founded on 18 December 2011. The New World First Bus Company Staff Union, the K.M.B. Staff Union and the Hong Kong Buildings Management And Security Workers General Union under the CTU and Civic Act-up joined the party as affiliated groups. The NWSC vetoed the motion of joining the Labour Party. 20-strong Executive Committee was elected with CTU General Secretary Lee Cheuk-yan was elected uncontestedly by 131 founding members, while Cyd Ho, Fernando Cheung and Yeung Ho-yan became the Vice-Chairmen, Cheung Kwok-che the Senate Chairman and Tam Chun-yin the General Secretary.

The party gained its first seat in the district level in the San Fu by-election in 2015. In the 2015 District Council election, the party filled in 12 candidates and 3 of them were elected. On 13 December 2015, the Labour chairman Lee Cheuk-yan stepped down and three candidates, Kwok Wing-kin, Cheng Sze-lut and Suzanne Wu Shui-shan ran for the chairmanship. Suzanne Wu of the Association for the Advancement of Feminism won the election in the end and became the new chairwoman.[3]